Light bulb



FIG. 1 is a top view of a light bulb showing my new design.

FIG. 2 is a side view thereof, having a first disclaimed portion.

FIG. 3 is a first side view thereof, having a second disclaimed portion.

FIG. 4 is a second side view thereof, having the second disclaimed portion.

FIG. 5 is a third side view thereof, having the second disclaimed portion.

FIG. 6 is a fourth side view thereof, having the second disclaimed portion; and,

FIG. 7 is a bottom view thereof, having the second disclaimed portion.

The broken lines in the figures are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a light bulb, as shown and described. 